It should be recalled that the zirconium oxide is a diamond imitation and 1.8 gr of money is worth little more than 1, so here we're really in the "junk" in terms of value (a certificate would also not really make sense).
However, to speak of the jewel itself, one can concede that it is very pretty and it will please the majority. The look is classic, maybe a little too much, will appeal to the majority but less youth. Loops are just large enough, will see well enough while remaining discrete The finish is neat, brightness is good but not as much as suggested by the picture (takes a bit to gray).
The set is not cheap and presented in a neat box, may well sell office for people who have little means.
In conclusion, a good tight bargain purchase without much value but certainly successful design and sure to please.